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TPS2H160-Q1: Current limit and Thermal shutdown

Part Number: TPS2H160-Q1

Hello

My customer chosen TPS2H160-Q1 for their product ( Proto-type stage)

They are testing for current limit opearation and thermal shutdown operation.

Would you please kindly check attached ppt and give me your advice?

I myslef  did not check by EVM.

 

Question

Q1  I think  step(A) ~(B) ST2 goes low is due to current limit.       

The difference between actual( 2.3A) and setting ( 1.8 A) seems to be      

due to current is slowly ( a 200~300ms/ step )increasing  like as other thread(*)?      

Please have your opinion. (*)

http://e2e.ti.com/support/power_management/switches/f/949/p/664302/2442152?tisearch=e2e-sitesearch&keymatch=tps2h160-q1#2442152

 

Q2  I think step(D)  Io kept ~0.7A is ICL(STD)=60% of  external current 

 limit setting . ( I don’t know the reason why 0.7A).       

Is it correct? Please have your opinion.

 

Q3  I think (D) to (E) is current limit during thermal shutdown,  

but  we see dithering during ( D) to (E).   

I don’t know whether  dithering is inherent  during thermal shutdown       

Is this inherent for TPS2H160-Q1?      

 

Please advise.

Best Regards

 

tps2H160-q1_therm_SD.pptx

 

 

 

 

 

  • Hello,

    1- Current peak reaches 2.3A and it is above the current limit set of 1.8A. It is normal and due to slow increment in load current 

    2- Current stays at 1.8A for a while and changes due to temperature shutdown or thermal swing. Need to investigate

    3- Current ripple is between 0.5A and 1A before complete shutdown. It could be a transient due to some ripple inside the FET gate bias circuit just before the shutdown. 

    Regards